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What are the two different types of Iron and Steel production ? Primary production and Scrap reclaiming What is smelting? The process of producing molten pig iron in a blast furnace Where does the source of heat come from in a blast furnace? Coke. Which is carbonized coal oxidized by blasting air under pressure. Why is limestone added to the molten pig iron? When limestone is added it produces slag. What is slag? Slag is the impurities removed from the molten pig iron which blankets on top and reduces the amount of oxygen in the molten mass. How is the metal melted in an electric arc oven? An arc is generated by electrodes which melts the metal What is an Ingot? an ingot is a stationary mould in which pig iron is solidified and sent off for further processing. molten is solidified into what 3 shapes in the continuous castings process? billets, bloom or slab What is the process of continuous castings? Ladles-Holding bath-casting machine with rollers. What are the four basic groups of ferrous metals? Wrought Iron, Cast Iron, Carbon and low alloy steel and specialty steels and heat resistant alloys Describe wrought iron consists of high purity iron and slag, very low carbon content, has directional properties, has a fibrous break when fractured. Describe cast iron Contains between 2-6.67% carbon, not ductile How are different types of cast iron classified? by their carbon content, alloy and impurity content, cooling rate during and after freezing, and heat treatment What are the six groups of cast irons? White cast iron, malleable cast iron, grey cast iron, chilled cast iron, nodular cast iron, alloy cast iron describe white cast iron pearlite in a white matrix of cementite. Cast-iron Melts easily then cast into shapes alternative to Victorian facades Used primarily for columns due to its compressive strength; also as low-cost Still used for decorative outdoorfurniture and landscape elements. Uses, heavy crushing machinery. car brakes discs, vice or machine parts. Mild steel A ferrous metal alloy made from Iron and Carbon. It is tough, ductile and malleable and mainly used for nails, car body panels and construction beams..Uses, nails, screws, furniture, building frames and strucures Medium carbon steel Strong and hard but less ductile than mild steel, tough or malleable. Uses, garden tools, springs Stainless steel A metal alloy of steel, chromium, and sometimes nickel which is used in casket construction; noted for its ability to resist rust. Uses, sinks, cutlery, work surfaces, dishes. High speed steel has properties that allow the tool to cut at high speeds. It will retain the cutting edge at temperatures up to 500°C. They contain elements of carbon, tungsten, chromium, vanadium, molybdenum and cobalt with the base metal iron. Uses, lathe cutting tools, drills, milling cutters. surgical steel Abdominal wound closeure, bone repair, metal prosthesis or implants